Texture appears pink in Blender Render
You're trying to use a cycles material with blender internal. This probably happened because you created your material with cycles selected and changed to blender internal. Materials are specific and can't be used with both renderers.

You can choose to change the renderer to cycles (1)
You can unassign your material and create a new one (2)
You can remove nodes from your material and modify it to be blender internal (3)